7-(1-Aminomethylcycloalkylcarboxamido)cephalosporanic

ABSTRACT

3-(2-Aminomethylcycloalkylcarboxamido)-1,4-(cyclo -(1&#39;&#39;carboxy)alkylenethio)azetidin-2-one derivatives possessing antibacterial activity are produced by the reaction of an Alpha -aminomethyl cycloalkylcarbonyl chloride with a 3-amino-1,4(cyclo-(1&#39;&#39;-carboxy)alkylenethio)azetidine-2-one.

United States Patent 1 Sellstedt et al.

AMINOMETHYLCYCLOALKYLCARBOXA- MIDO)CEPHALOSPROANIC ACID DERIVATIVES Inventors: John H. Sellstedt, King of Prussia;

Daniel M. Teller, Devon; Charles J. Guinosso, King of Prussia. all of Pa.

American Home Products Corporation, New York, NY.

Filed: Mar. 30, 1973 Appl. No.: 346,496

Assignee:

[ Aug. 5, 1975 [56] References Cited UNITED STATES PATENTS 3,516,997 6/1970 Takano et a1. 260/243 C 3,592,812 7/197] Album et a]. 260/243 C Primary E.\'aminerNicholas S. Rizzo Attorney, Agent, or Firm-Richard K. Jackson [5 7 ABSTRACT 3-(Z-Aminomethylcycloalkylcarboxamido)-1 ,4- cyclo- 1-carboxy)alkylenethio]azetidin-Z-one derivatives possessing antibacterial activity are produced by the reaction of an a-aminomethyl cycloalkylcarbonyl chloride with a 3-amino-1 ,4-[cyclo-( l carboxy)alkylenethiolazetidine-Z-one.

3 Claims, No Drawings 7-(1- 4 and the pharmaceutically acceptable addition salts AMINOMETHYLCYCLOALKYLCARBOXAMIDO)- thereof, I t t CEPHALOSPORANIC ACID DERIVATIVES The I expression 7 l,4-[cyclo-(lcarboxy)alkylenet hio], used in the eneric name for DESCRIPTION OF THE INVENTION the compounds of this invention, is intended to emln accordance with this invention, there is provided brace the l-ca'rboxy bridgemember' a group of azetidin-Z-one derivatives which are active i I anti-bacterials, More specifically, the compounds of this invention may be generically termed 3-0zaminomethylcycloalkylcarboxamido)-l,4- l0 Y [cyclo( l 'carboxy)alkylenethiolazetidin-Z-one derivatives which present the structural formulae: v i CO2 R as it appears in the preceding paragraph. The term S (lower)alk yl is used to designate univalent aliphatic hy- (CH0) n CNH drocarbon radicals containing from 1 to about 6 carbon n atoms, illustrative of Wl'llCh members are methyl, ethyl, V n-propyl, i-propyl, n-bu'tyl, t-butyl, n-pentyl, n-hexyl f O and the like. The term (l0wer)alkanoyloxy embraces CH the lower fatty acyloxy moieties such as acetoxy, 2 CO H propanoyloxy, butanoyloxy, amyloxy, hexanoyloxy, l and the like. The pharmaceutically acceptable addition NHq salts contemplated embrace the alkali metal salts and the ammonium salt of the l-carboxy group as well as in which the acid addition salts of the free a-aminomethyl group R is fl y such as those derived from hydrochloric, hydrobromic, n s an n eg from inclusive; and sulfuric, nitric, phosphoric, benzenesulfonic, toluene- Y is sulfonic, methylsulfonic, and ethylsulfonic acids, and

' CH C 1 the like. 3 I 3 The 3-(a-aminomethylcycloalkylcarbonamido) C of azetidinone derivatives of thisv invention are prepared 33 by the reaction of an aaminomethylcycloalkylcar- CH boxylic acid halide with the 3-amino azetidinone deriv- 3 ative designated H NR, thusly:

. CH Nl-l in which the values for R and n are given above, and R representsthe residue of the 3-amino azetidinone derivative as described supra in the generic structural formula. The free amino group in the a-aminomethyl cycloalkylcarboxylic acid reactant may be protected N -N during the reaction with an acid to form an acid addition salt which may be readily removed bybaslfication M" S S i 5 and after the reaction. In addition, the aammomethyl group may be protected by cyclization with the a-carboxy group with ethyl chloroformate to afford an acylating agent other than an acid halide. Likewise, the free amino group and the free "carboxy group in the azetidino reactant may be protected during the reaction with an alkali metal or tertiary amine, when operating in a mixed aqueous organic medium, or by monoor disilylation, phosphorylation or saccharination. In each case, the protective groups are readily removed by hydrolysis at the conclusion of the reaction.

The compounds of this invention are useful in the I l fields of comparative phannacology and microbiology S 65 and may be used in the treatment of bovine mastitis, as

wherein R is -H, (lower)alkanoyloxy, 45

growth promotors in animals and for the treatment of infections amenable to treatment with penicillins and cephalosporins.

ethyl The 04- aminomethylcycloalkylcarboxylic acid starting materials may be prepared by the method of E. Testa et a1., Liebigs Ann. Chem., 639, 166( 1961 wherein 1-aminomethylcyclopentanecarboxylic acid is described. By analogy, l-aminomethylcyclohexanecarboxylic acid is prepared by reducing ethyl oz-cyanocyclohexanecarboxylate (.1. Cadogan et al., J. Chem. Soc. (London), 1932, (1965) with Raney nickel to afford a-aminomethylcyclohexanecarboxylate, b.p. 6269C./0.1 mm. Hg. which is hydrolyzed with concentrated hydrochloric acid to yield the HCl salt of the free carboxylic acid as colorless crystals m.p. 201-203C. The a-aminomethylcyclohexanecarboxylic acid hydrochloride is then readily converted to the acid chloride, m.p. l60-165C. (decomp.) with PCl to provide the desired acylating agent. The corresponding cycloheptane and cyclooctane derivatives may be produced in the same manner.

The following examples are presented for purposes of illustration and should not be construed as limitations upon the true scope of this invention. The biological activity data presented after each example illustrates the compounds activity against specific bacteria of the designated strain in terms of the minimum inhibitory concentration of the compound in micrograms per milliliter to completely inhibit the test organism.

EXAMPLE 1 7-( l-Aminomethylcyclohexanecarboxamido)cephalosporanic acid.

A mixture of 7-aminocephalosporanic acid (1.36 g, 0.005 moles) and hexamethyldisilazane (0.84 ml, 0.004 moles) in methylene chloride (14 ml.) containing 2 drops of chlorotrimethylsilane is refluxed for hours and then allowed to stand at room temperature for 14 hours. The solution is cooled to C, dimethylaniline (0.64 ml) is added and then l-aminomethylcyclohexanecarboxylic acid chloride hydrochloride (1.06 g, 0.005 moles) is added to 0C. over 10 minutes. After stirring at 5C. for minutes and 10--15C. for 30 minutes the clear yellow solution is poured into 40 ml of iced water. The pH of the mixture is raised to 9.0 with potassium carbonate, the solution washed with diethyl ether to remove dimethyl aniline, and the pH is lowered to 5.0 with concentrated hydrochlorice acid. After concentration in vacuo 35C. to about 30 ml. the mixture is purified on'an XAD-2 resin column by washing with 3 X 150 ml. of water and eluting with 150 ml. of an 8/2 mixture of acetone/water. Freeze-drying gives the title compound, m.p. 275278C. (decomp.) A 5.69, 6.28 4.;NMR has singlets at 1.55 and 2.03

Ba. subtilis 6633 .976

St. aureus 6538P 3.90 St. aureus SMITH 3.90 St. aureus CHP 15.6

St. aureus 53-180 15.6 Ba. brochiseptica 4617 250 Es. coli 9637 250 Ne. catarrhalis 8193 250 EXAMPLE 2 7-( l-Aminomethylcyclopentanecarboxamido )cephalosporanic acid.

5 Using the procedure described in Example 1 but substituting l-aminomethylcyclopentanecarboxylic acid chloride hydrochloride (0.99 g, 0.005 moles) for 1- aminomethylcyclohexanecarboxylic acid chloride hydrochloride and refluxing 75 minutes instead of 5 hours 10 gives the title compound after columning on XAD-2 resin and freeze-drying, m.p. 250300C. (d), h 5.65 ,u.; NMR has 1.80 and 2.12 ppm peaks.

Ba. subtilis 6633 .488

St. aureus 6538P 1.95 St. aureus SMITH 3.90 St. aureus CHP 3.90 St. aureus 53-180 7.81 K1. pneumoniae 10031 31.3 Sa. paratyphi 1 1737 62.5

Es. coli 9637 125 B0. brochiseptica 4617 250 EXAMPLE 3 6-( 1-Aminomethylcyc1ohexanecarboxamido)penicillinic acid Using the procedure described in Example 1 but substituting 6-aminopenicillanic acid (1.08 g, 0.0005

moles) for 2-ammocephalosporan1c acid and refluxing for 3 hours instead of 5 hours gives the title compound after columing on XAD-2 resin and fieeze-drying; m.p. 180230C. (decomp.); A 5.64, 6.17 ,u.; NMR

has 1.58 and 1.70 ppm peaks.

Ba subtilis 6633 .976

St. aureus 6538P 1.95

St. aureus SMITH 1.95

He. species 9955 3.90

Sa. paratyphi 11737 15.6 Es. intermedia 65-1 31.3 Ne. catarrhalis 8193 31.3 St. aureus 53-180 31.3 St. aureus CHP 31.3 Es. coli 9637 62.5 En. aerogenes 13048 125 Pr. vulgaris 6896 125 EXAMPLE 4 6-( l-Aminomethylcyclopentanecarboxamido)penicillanic acid.

Using the procedure described in Example 3 but substituting 1-aminocyclopentanecarboxylic acid chloride hydrochloride (1.07 g, 0.005 moles) for laminomethylcyclohexanecarboxylic acid chloride hydrochloride and refluxing for 3 hours instead of 5 hours gives the title compound after columning on XAD-2 resinand freeze-drying; m.p. 178-210C. (decomp.);

mnr IL; has and peaks.

Ba. subtilis 6633 .488

St. aureus 6538P .976 St. aureus SMITH .976 Sa. paratyphi 1 1737 3.90 He. species 7.81

l. A compound of the formula CH NH wherein R is H or lower alkyl;

l 1 l CHZR Con R is H, (lower)alkanoyloxy,

n is an integer from 4-7, inclusive; and the phannaceutically acceptable addition salts thereof.

2. A compound of claim 1 which aminomethylcyclohexanecarboxamido )cephalospo-' ranic acid.

3. A compound of claim 1 which is 7-(1- aminomethylcyclopentanecarboxamido)cephalosporanic acid.

UNITED STATES PATENT OFFICE QE'H KQATE 0F CQEC'HON PATENT NO. 5,898,217

DATED I August 5, 1975 INVENTOR(5) I John H, Sellstedt, Daniel M. Teller and Charles J. Guinosso It IS certified that error appears In the aboverdent|fred patent and tnat sard Letters Patent are hereby corrected as shown below:

Column 6, Claim 1, the structural formulae should be N N r\r- N f S H or s l H a 7 3 ---l \-l S \N/ fir'gned and eaie {SEAN first 0f June1976 Arrest:

RUTH c. MASON c. MARSHALL DANN Alresrmg Officer V Commissioner 0] Patents and Trademarks 

1. A COMPOUND OF THE FORMULA
 2. A compound of claim 1 which is 7-(1-aminomethylcyclohexanecarboxamido)cephalosporanic acid.
 3. A compound of claim 1 which is 7-(1-aminomethylcyclopentanecarboxamido)cephalosporanic acid. 